pip pip

Etymology
Possibly imitative, see pip pip pip.

Interjection

 * 1)  Goodbye; cheerio, toodeloo (toodle-oo), toodle pip.
 * 2) * 1937 October, “” [pseudonym; G. T. Fleming-Roberts], “‘No End by Death’”, in Secret Agent “X” in The Assassins’ League, Springfield, Mass.: Periodical House, Inc., 20615773 ; reprinted [Doylestown, Pa.?]:, 2006, ISBN 978-0-8095-7175-8 , page 24:
 * Gee-Gee struck a Fifth Avenue attitude. "Home, James. My car and chauffeur awaits me lord in the alley. Pip-pip, big stuff."

Usage notes
Very rarely used in North America, where it is most likely to be considered humorous and is often used in a parody of British English speakers, particularly in “Pip pip, cheerio!” or “Pip pip, old chap!”.